The extension cost of the Osaka Metro Chuo Line to Yumeshima, which is also the IR site and the Expo venue, and the new station construction cost will increase by 12.9 billion yen. The breakdown is 4 billion yen for the construction of soft ground, 5.6 billion yen for explosion-proof measures and obstacle removal, and 3.3 billion yen for the development of the new Yumeshima Station, for a total project cost of 66.9 billion yen. The Osaka prefectural government recently announced that it will contribute about 80 billion yen to the Yumeshima area for soil contamination countermeasures.

* At the Kansai Expo, the total amount increased by 60 billion yen to 185 billion yen. We explain the process at the IGS seminar.

https://www.asahi.com/articles/ASQ1C76YNQ1CPTIL01H.html